Austenite Grain Growth Tendency of Several Spring Steels Used for High-Speed Trains
SHI Xian-bo1,2,ZHAO Lian-yu1,YAN Wei1,SHAN Yi-yin1,SHEN Ming-gang2,YANG Ke1
1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China 2. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China
Abstract：The prior austenite grain size of spring steel has an important effect on mechanical properties and fatigue properties. The prior austenite grain growth tendency of four spring steels, 51CrV4, 52CrMoV4, 60Si2CrVA and 60Si2MnA, used for high-speed trains was investigated by optical microscopy. The reason that four spring steels showed different coarsening temperatures was analyzed by TEM observation. Experimental results show that the chemical compositions of these spring steels have an important effect on the prior austenite grain growth, the addition of Cr, Mo and V in spring steels is effective in preventing the prior austenite grain growth, and the grain-coarsening temperature has a close relationship with the solution temperature of microalloy carbonitrides. In the temperature range of 800-1100℃, 51CrV4 shows the smallest prior austenite grain growth tendency, 52CrMoV4 and 60Si2CrVA are the second, 60Si2MnA possesses the largest prior austenite grain growth tendency.
史显波 ，赵连玉，严伟，单以银，沈明钢，杨柯. 几种高速列车用弹簧钢的奥氏体晶粒长大倾向[J]. 钢铁, 2013, 48(3): 60-65.
SHI Xian-bo,,ZHAO Lian-yu,YAN Wei,SHAN Yi-yin,SHEN Ming-gang,YANG Ke. Austenite Grain Growth Tendency of Several Spring Steels Used for High-Speed Trains. Iron and Steel, 2013, 48(3): 60-65.
2013, Vol. 48 
